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authorJarkko Nikula <jhnikula@gmail.com>2009-08-23 12:24:27 +0300
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-08-25 10:20:48 +0100
commitd09a2afc9359407114b7062519101f1ee2d05388 (patch)
tree43a4ac61d26e2c760dc2547066cef1b4d076a07f /arch/arm/plat-omap/mcbsp.c
parent32080af7a612e8c56131d6bdcd268cd9e8b0add1 (diff)
ARM: OMAP: McBSP: Merge two functions into omap_mcbsp_start/_stop
Functionality of functions omap_mcbsp_xmit_enable and omap_mcbsp_recv_enable can be merged into omap_mcbsp_start and omap_mcbsp_stop since API of those omap_mcbsp_start and omap_mcbsp_stop was changed recently allowing to start and stop individually the transmitter and receiver. This cleans up the code in arch/arm/plat-omap/mcbsp.c and in sound/soc/omap/omap-mcbsp.c which was the only user for those removed functions. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Acked-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com> Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'arch/arm/plat-omap/mcbsp.c')
-rw-r--r--arch/arm/plat-omap/mcbsp.c84
1 files changed, 28 insertions, 56 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index ee60ab68251..8dc7927906f 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -529,11 +529,13 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
}
/* Enable transmitter and receiver */
+ tx &= 1;
w = OMAP_MCBSP_READ(io_base, SPCR2);
- OMAP_MCBSP_WRITE(io_base, SPCR2, w | (tx & 1));
+ OMAP_MCBSP_WRITE(io_base, SPCR2, w | tx);
+ rx &= 1;
w = OMAP_MCBSP_READ(io_base, SPCR1);
- OMAP_MCBSP_WRITE(io_base, SPCR1, w | (rx & 1));
+ OMAP_MCBSP_WRITE(io_base, SPCR1, w | rx);
/*
* Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
@@ -549,6 +551,16 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));
}
+ if (cpu_is_omap2430() || cpu_is_omap34xx()) {
+ /* Release the transmitter and receiver */
+ w = OMAP_MCBSP_READ(io_base, XCCR);
+ w &= ~(tx ? XDISABLE : 0);
+ OMAP_MCBSP_WRITE(io_base, XCCR, w);
+ w = OMAP_MCBSP_READ(io_base, RCCR);
+ w &= ~(rx ? RDISABLE : 0);
+ OMAP_MCBSP_WRITE(io_base, RCCR, w);
+ }
+
/* Dump McBSP Regs */
omap_mcbsp_dump_reg(id);
}
@@ -570,12 +582,24 @@ void omap_mcbsp_stop(unsigned int id, int tx, int rx)
io_base = mcbsp->io_base;
/* Reset transmitter */
+ tx &= 1;
+ if (cpu_is_omap2430() || cpu_is_omap34xx()) {
+ w = OMAP_MCBSP_READ(io_base, XCCR);
+ w |= (tx ? XDISABLE : 0);
+ OMAP_MCBSP_WRITE(io_base, XCCR, w);
+ }
w = OMAP_MCBSP_READ(io_base, SPCR2);
- OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(tx & 1));
+ OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~tx);
/* Reset receiver */
+ rx &= 1;
+ if (cpu_is_omap2430() || cpu_is_omap34xx()) {
+ w = OMAP_MCBSP_READ(io_base, RCCR);
+ w |= (tx ? RDISABLE : 0);
+ OMAP_MCBSP_WRITE(io_base, RCCR, w);
+ }
w = OMAP_MCBSP_READ(io_base, SPCR1);
- OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(rx & 1));
+ OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~rx);
idle = !((OMAP_MCBSP_READ(io_base, SPCR2) |
OMAP_MCBSP_READ(io_base, SPCR1)) & 1);
@@ -588,58 +612,6 @@ void omap_mcbsp_stop(unsigned int id, int tx, int rx)
}
EXPORT_SYMBOL(omap_mcbsp_stop);
-void omap_mcbsp_xmit_enable(unsigned int id, u8 enable)
-{
- struct omap_mcbsp *mcbsp;
- void __iomem *io_base;
- u16 w;
-
- if (!(cpu_is_omap2430() || cpu_is_omap34xx()))
- return;
-
- if (!omap_mcbsp_check_valid_id(id)) {
- printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
- return;
- }
-
- mcbsp = id_to_mcbsp_ptr(id);
- io_base = mcbsp->io_base;
-
- w = OMAP_MCBSP_READ(io_base, XCCR);
-
- if (enable)
- OMAP_MCBSP_WRITE(io_base, XCCR, w & ~(XDISABLE));
- else
- OMAP_MCBSP_WRITE(io_base, XCCR, w | XDISABLE);
-}
-EXPORT_SYMBOL(omap_mcbsp_xmit_enable);
-
-void omap_mcbsp_recv_enable(unsigned int id, u8 enable)
-{
- struct omap_mcbsp *mcbsp;
- void __iomem *io_base;
- u16 w;
-
- if (!(cpu_is_omap2430() || cpu_is_omap34xx()))
- return;
-
- if (!omap_mcbsp_check_valid_id(id)) {
- printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
- return;
- }
-
- mcbsp = id_to_mcbsp_ptr(id);
- io_base = mcbsp->io_base;
-
- w = OMAP_MCBSP_READ(io_base, RCCR);
-
- if (enable)
- OMAP_MCBSP_WRITE(io_base, RCCR, w & ~(RDISABLE));
- else
- OMAP_MCBSP_WRITE(io_base, RCCR, w | RDISABLE);
-}
-EXPORT_SYMBOL(omap_mcbsp_recv_enable);
-
/* polled mcbsp i/o operations */
int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
{